Isonoe Electronics is a London-based audio company founded in 2004 by producer and engineer Justin Greenslade. The brand hand-builds boutique gear aimed at audiophiles and club systems, working primarily with rotary DJ mixers, inductor-based equalisers, isolators, preamps and power supplies. All electronics are assembled in London, with the company emphasising point-to-point construction and long-life parts.

The brand is widely recognised for its Isolation System — magnesium-alloy CNC-machined feet that became a de facto standard for Technics SL-1200 turntables in clubs and high-end hi-fi setups. Other flagship products include the ISO420 mixer-preamplifier and a heavyweight inductor-based equaliser, alongside bespoke rebuilds and modifications of vintage Bozak and Urei rotary mixers.

Isonoe has built preamps, power supplies and custom equipment for figures across the underground dance and audiophile world, including Mr Scruff, James Murphy and Floating Points. Greenslade's background as a producer and engineer working alongside artists such as Harvey informs the company's focus on club-grade dynamics and analogue signal paths.

Isonoe has 3 products cataloged on Equipboard, including DJ Accessories, DJ Mixers, and Mixers. Their gear is featured by 3 artists, with the strongest followings in Electronic. Notable users include Floating Points, Mr. Scruff, and Loco Dice.